| Base | Representation |
|---|---|
| bin | 10000101101111… |
| … | …101111101110000 |
| 3 | 201112210011002220 |
| 4 | 100231331331300 |
| 5 | 1033301020434 |
| 6 | 43455441040 |
| 7 | 6644042460 |
| oct | 2055757560 |
| 9 | 645704086 |
| 10 | 280485744 |
| 11 | 134366100 |
| 12 | 79b26180 |
| 13 | 461577c6 |
| 14 | 29373ba0 |
| 15 | 19956d49 |
| hex | 10b7df70 |
280485744 has 120 divisors (see below), whose sum is σ = 910358400. Its totient is φ = 72842880.
The previous prime is 280485743. The next prime is 280485761. The reversal of 280485744 is 447584082.
280485744 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
It is a Harshad number since it is a multiple of its sum of digits (42).
It is a junction number, because it is equal to n+sod(n) for n = 280485696 and 280485705.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (280485743) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37207 + ... + 44105.
It is an arithmetic number, because the mean of its divisors is an integer number (7586320).
Almost surely, 2280485744 is an apocalyptic number.
280485744 is a gapful number since it is divisible by the number (24) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 280485744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (455179200).
280485744 is an abundant number, since it is smaller than the sum of its proper divisors (629872656).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
280485744 is a wasteful number, since it uses less digits than its factorization.
280485744 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 6939 (or 6922 counting only the distinct ones).
The product of its (nonzero) digits is 286720, while the sum is 42.
The square root of 280485744 is about 16747.7086193903. The cubic root of 280485744 is about 654.5913532067.
The spelling of 280485744 in words is "two hundred eighty million, four hundred eighty-five thousand, seven hundred forty-four".
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